Wireless local area network

ABSTRACT

The present invention relates to a wireless local area network comprising: a base transceiver station ( 1 ) comprising means for transmitting signals over a wireless connection to one or more terminals ( 2 ) connected to the local area network, and means for receiving signals over a wireless connection from one or more terminals ( 2 ) connected to the local area network, and a user interface ( 4 ) to enable a user to transmit a control command to the local area network in order for the local area network to allow a new terminal ( 3 ) to be connected to the local area network. In order to improve user-friendliness, said new terminal ( 3 ) is arranged to transmit a connect message comprising an identifier to identify the new terminal ( 3 ) to the local area network when said new terminal ( 3 ) tries to access said wireless network. Furthermore, the local area network is arranged to transmit information on one or more new terminals ( 3 ) trying to access said wireless network to the user through said user interface ( 4 ). The local area network is further arranged to provide access to the network for the terminal(s) the information on which has been transmitted to the user through the user interface ( 4 ) and for which the user has given said control command through the user interface.

The present invention relates to a wireless local area network whereinterminals, through a base transceiver station, are able to communicatewith each other and possibly with terminals connected to othertelecommunication networks if the base transceiver station is connectede.g. to the Internet.

Wireless local area networks are previously known, such as wirelesslocal area networks WLAN, wherein mobile terminals (clients) equippedwith WLAN cards move around and, using radio signals, communicate with“access points”. A problem associated with these known wireless localarea networks is the way in which a new terminal is connected to anetwork. Since terminals are connected to the network through a wirelessconnection, in practice the wireless network necessitates an arrangementto prevent unauthorized terminals from connecting to the network.Otherwise there is a risk that e.g. an outsider standing in the streetmight, using a wireless terminal, access a wireless local area networkof an adjacent company.

In the known wireless local area networks, the use of unauthorizeddevices has been prevented by only allowing terminals registered in aparticular network to be used therein. If a new terminal is to be usedin the network, information on the particular terminal should beregistered in the network in advance so that a base transceiver stationof the network would be willing to communicate with the new terminal.

In the known wireless local area networks, the registration mentionedabove is implemented such that each terminal has a unique identifier ofits own to enable the particular terminal to be identified. Before theterminal is put to use in a wireless network, the identifier of theterminal should be entered into the wireless local area network. Inpractice, the identifier can be entered e.g. into a base transceiverstation of the wireless local area network. When the wireless networkknows the identifier identifying the terminal, the base transceiverstation of the wireless network allows the terminal to access thenetwork.

The known solution described above presents such a problem that it isrelatively difficult to register a new terminal in a wireless local areanetwork. In practice, the problem usually is that a user does not knowthe identifier of his or her terminal. Neither can the user thus enterinto the local area network the identifier that would enable his or herterminal to be used in the wireless local area network. The problem isparticularly serious in wireless networks used in households and smallcompanies, because technical support is not often available, at leastnot easily enough.

An object of the present invention is to alleviate the above-describedproblem and to provide a solution to improve the user-friendliness ofwireless local area networks, and particularly to make a new terminaleasier to connect to a wireless local area network. This object isachieved by a method of the invention for connecting a terminal to awireless local area network. The method of the invention ischaracterized by arranging said terminal to transmit a connect messagecomprising an identifier to identify the terminal, retrieving, through auser interface, information on terminals which have tried to access thelocal area network, i.e. terminals that have transmitted a connectmessage, selecting, through the user interface, said terminal to beconnected to the local area network from among the terminals that havetried to access the local area network, and entering, through the userinterface, a control command as a result of which the local area networkallows the terminal selected through said user interface to access thelocal area network.

The invention also relates to a wireless local area network comprising:a base transceiver station comprising means for transmitting signalsover a wireless connection to one or more terminals connected to thelocal area network, and means for receiving signals over a wirelessconnection from one or more terminals connected to the local areanetwork, and a user interface to enable a user to transmit a controlcommand to the local area network in order for the local area network toallow a new terminal to be connected to the local area network. Thewireless local area network of the invention is characterized in thatsaid new terminal is arranged to transmit a connect message comprisingan identifier to identify the new terminal to the local area networkwhen said new terminal tries to access said wireless network, the localarea network is arranged to transmit information on one or more newterminals trying to access said wireless network to the user throughsaid user interface, and the local area network is arranged to provideaccess to the network for the terminal(s) the information on which hasbeen transmitted to the user through the user interface and for whichthe user has given said control command through the user interface.

The invention also relates to a base transceiver station of a wirelesslocal area network, the base transceiver station comprising means fortransmitting signals over a wireless connection to one or more terminalsconnected to the local area network, and means for receiving signalsover a wireless connection from one or more terminals connected to thelocal area network. The base transceiver station of the invention ischaracterized in that the base transceiver station comprises means fortransmitting information on one or more new terminals which have triedto access said wireless network to a user interface, and the basetransceiver station is arranged to provide access to the network for theterminal(s) the information on which has been transmitted to said userinterface by the base transceiver station and for which the basetransceiver station has received a control command through the userinterface in order to connect the terminals(s) to the wireless network.

The invention also relates to a terminal of a wireless local areanetwork, the terminal comprising means for transmitting signals over awireless connection to a base transceiver station of the local areanetwork, and means for receiving signals over a wireless connection fromthe base transceiver station of the wireless local area network. Theterminal of the invention is characterized in that the terminal isarranged to transmit a connect message comprising an identifier toidentify the terminal to the base transceiver station when said terminaltries to access said wireless network.

The invention is based on the idea that the user-friendliness of awireless local area network is considerably improved when a new terminalto be connected to the network is arranged to transmit its identifier tothe wireless network, whereafter, through a user interface of thewireless local area network, the new terminal on which information istransmitted to the user by the user interface is simply accepted intouse by the user. The user does thus not need to know the identifier ofthe terminal to be connected to the wireless local area network but theidentifier is automatically transmitted from the terminal to thewireless local area network. The user, through the user interface, onlyneeds to accept the new terminal to be connected to the network.

In accordance with the invention, information e.g. on the terminals thathave tried to access the wireless network during the last minute can betransmitted to the user through the user interface. The user can thus besure that e.g. the terminal that he or she has just switched on in orderto connect the particular terminal to the wireless local area network isthe particular terminal the information on which is transmitted to theuser by the user interface.

The most important advantage of the solution of the invention is thusimproved user-friendliness. Furthermore, the user, through the userinterface of the local area network, is enabled to monitor whether anoutside terminal repeatedly tries to access his or her local areanetwork. This is achieved by providing the wireless local area networkwith a memory to store long-term information on the terminals that havetried to access the wireless local area network.

Preferred embodiments of the wireless local area network, basetransceiver station and terminal of the invention are disclosed independent claims 3, 4, 6 and 8 to 10.

In the following, the invention will be described in closer detail byway of example and with reference to the accompanying drawings, in which

FIG. 1 is a block diagram showing a first preferred embodiment of awireless local area network of the invention, and

FIG. 2 is a flow diagram showing a first preferred embodiment of amethod of the invention.

FIG. 1 is a block diagram showing a first preferred embodiment of awireless local area network of the invention. In the case of FIG. 1, abase transceiver station 1 serves as an access point of the local areanetwork. In the exemplary case of FIG. 1, the base transceiver station 1is connected to a more extensive telecommunication network, e.g. to theInternet, through an asymmetric data subscriber line ADSL interface.

The wireless local area network of FIG. 1 has been provided with twoterminals, i.e. a portable microcomputer 2 and a desktop microcomputer3, connected thereto. Using radio signals, the terminals communicatewith the base transceiver station 1, which means that through the basetransceiver station they are able to communicate e.g. with each otheror, alternatively, they can be connected e.g. to the Internet throughthe ADSL interface of the base transceiver station. The microcomputers 2and 3 can be prior art microcomputers having wireless local area networkWLAN cards known per se installed therein. The WLAN cards are providedwith the necessary radio equipment to enable the microcomputers, usingradio signals, to communicate with the base transceiver station. In theWLAN network of FIG. 1, communication may take place e.g. within afrequency range of 2.4 GHz.

Although in the case of FIG. 1 both terminals connected to the wirelesslocal area network are microcomputers, any device for which atelecommunication connection is to be set up can be connected to thewireless network of the invention. The terminals can thus comprise e.g.an output unit, wireless telephone or a home electronics device, such asa television, radio or even a washing machine, if a need exists to setup a telecommunication connection to such a device.

The wireless local area network of FIG. 1 also comprises a userinterface 4 to enable the wireless local area network to be controlled.In the exemplary case of FIG. 1, a terminal connected to the basetransceiver station I constitutes the user interface. The user interfacecan, however, be implemented in another way, e.g. by integrating it intothe base transceiver station 1. The base transceiver station can thencomprise a display and a keypad to enable the user to control the localarea network.

In the case of FIG. 1, the user interface can be integrated such thatthe base transceiver station maintains world wide web WWW pages ontowhich it produces information on the local area network. The terminalserving as the user interface 4 then employs browser software to enablea person maintaining the local area network to access the WWW pages ofthe base transceiver station in order to read and enter information.According to the invention, a piece of the information produced onto theWWW pages of the base transceiver station is a list of such terminalswhich have tried to access the wireless local area network e.g. duringthe last minute. The user can thus see the list of the terminals thathave tried to access the network from the display of the user interface4, in which case the user can through his or her terminal give a controlcommand to the base transceiver station e.g. to connect a particularterminal to the wireless local area network. The process of connecting anew terminal to the local area network of FIG. 1 will be described incloser detail by means of the flow diagram of FIG. 2.

FIG. 2 is a flow diagram showing a first preferred embodiment of amethod of the invention. The flow diagram of FIG. 2 can be utilized e.g.for connecting a new terminal to the wireless local area network shownin FIG. 1. In the following description, it will be assumed that aterminal 3 is being connected to the wireless local area network of FIG.1, the use of the particular terminal in the local area network havingearlier been prevented by the base transceiver station 1 because theterminal has not been previously registered in the local area network ofFIG. 1.

In block A, the terminal 3 trying to access the network is arranged totransmit a connect message provided with an identifier of the terminal.Prior to this, the terminal 3 has either automatically examined theavailable channels until it has found the traffic channel used by thebase transceiver station (the network name determined for the terminalbeing displayed on the traffic channel) or the correct traffic channelhas been supplied to the terminal, in which case the terminal does notneed to carry out a search. In block A, the terminal 3 is arranged totransmit such a connect message that the local area network (the basetransceiver station in the case of FIG. 1) will understand that theterminal is a new terminal which tries to access the local area networkmaintained by the base transceiver station. The identifier transmittedin the connect message by the terminal 3 comprises a unique,terminal-specific identifier to enable the terminal to be distinguishedfrom other terminals. An alternative is to use a medium access controlMAC address of the terminal.

In block B, information on the terminal that tried to access the networkis retrieved through the user interface 4. In the case of FIG. 1, thisinformation is stored in the memory of the base transceiver 1, fromwhich it is retrieved by means of the user interface 4, i.e. theterminal. According to the invention, the display of the user interfacethen shows a list of the identifiers of the terminals that have tried toaccess the network. The times at which the terminal having theparticular identifier has tried to access the network can be shown inconnection with the identifiers. Alternatively, the display of the userinterface may show a list of the identifiers of only the terminals thathave tried to access the network e.g. during the last minute. The usercan thus be relatively sure that the identifier shown on the display ofthe user interface is the identifier of the terminal 3 which he or sheis adding to the wireless network.

In block C, the terminal 3 to be connected to the network is selectedthrough the user interface from among the devices that have tried toaccess the wireless network, and in block D, through the user interface,a control command is entered as a result of which the local areanetwork, i.e. in practice the base transceiver station 1 in the case ofFIG. 1, allows the selected device(s) to access the network. Dependingon the implementation, the procedures of blocks C and D can be carriedout in one or more stages, e.g. such that the terminal(s) that is/are tobe connected to the network is/are selected from the user interface bymeans of the graphic user interface 4, after which a control command isgiven e.g. by pressing the ENTER key to accept the selected terminals tobe added to the network.

In accordance with the invention, the user interface enables the user,through the user interface, to enter a “cleartext name” (e.g. “the studycomputer”) for the new terminal connected to the network. If desired,through the user interface, the user is thus capable of viewing the listof the terminals that are allowed to be used in the network, the listbeing located in the memory of the base transceiver station 1. Thecleartext names selected by the user himself or herself thus enable asuser-friendly a presentation of the allowed devices as possible. If theuser later wishes to remove a single device, this can also be carriedout through the graphic user interface e.g. such that the user, usingthe list produced by the user interface, selects the terminal he or shewishes to remove. Since the names given by the user to the terminals areshown, different devices are easy to identify through the userinterface.

It is to be understood that the above description and the relatedfigures are only intended to illustrate the present invention. It isobvious to one skilled in the art that the invention can be varied andmodified in many ways without deviating from the scope and spirit of theinvention disclosed in the claims.

1. A method for connecting a terminal to a wireless local area network,the method comprising: receiving a plurality of connect messages fromone or more terminals, each connect message comprising a request toconnect to the wireless local area network and an identifier for arespective terminal; providing a list to a user interface, the listidentifying the one or more terminals from which a connect message hasbeen received; receiving a control command from the user interface, thecontrol command representing a user selection of a particular terminalfrom the list to be connected to the wireless local area network, theuser selection performed by a user associated with the particularterminal; and connecting the terminal selected in the control command tothe wireless local area network.
 2. The method of claim 1, wherein theidentifier for each terminal comprises a MAC address assigned to theterminal.
 3. The method of claim 1, wherein the list identifies aplurality of connection requests for a single terminal and a timeassociated with each of the identified connection requests.
 4. Themethod of claim 1, wherein providing the list to the user interfacecomprises displaying the list on a display of a network control terminalcoupled to the wireless local area network.
 5. The method of claim 4,wherein the list associates a time at which a terminal attempted toaccess the wireless local area network with the identifier of thatterminal.
 6. The method of claim 1, further comprising, associating theidentifier of a terminal with a cleartext name selected by the user,wherein the list associates the cleartext name with the identifier ofthe one or more terminals that attempted to access the wireless localarea network.
 7. A base transceiver station of a wireless local areanetwork, the base transceiver station comprising: means for receiving aplurality of connect messages from a plurality of terminals over awireless connection, each connect message comprising a request toconnect to the wireless local area network and an identifier for acorresponding terminal; means for transmitting signals over the wirelessconnection to the plurality of terminals; means for transmitting, to auser interface, information on one or more terminals not connected tothe wireless local area network that have attempted to access thewireless local area network, wherein the base transceiver station isenabled to allow a particular terminal access to the wireless local areanetwork when the base transceiver station receives a control commandthrough the user interface, the control command representing a selectionof a particular terminal among the one or more terminals that haveattempted to access the wireless local area network.
 8. The basetransceiver station of claim 7, wherein the identifier comprises a MACaddress assigned to the terminal.
 9. The base transceiver station ofclaim 7, wherein the user interface is provided on a separate terminalconnected to the wireless local area network.
 10. The base transceiverstation of claim 7, wherein the user interface is integrated with thebase transceiver station.
 11. The base transceiver station of claim 7,wherein the information transmitted to the user interface identifies aplurality of connection requests for a single terminal and a timeassociated with each of the identified connection requests.
 12. A methodfor managing access to a wireless network via a base transceiver, themethod comprising: receiving, at the base transceiver, a plurality ofconnection requests to the wireless network from a plurality ofterminals, each connection request 35 including a unique identifierassociated with a corresponding terminal; storing a list that identifiesthe connection requests; providing the list to a user interface, theuser interface configured to display the list and to allow selection ofa terminal from the list; receiving, from the user interface, a userselection of a terminal from the list; and allowing the selectedterminal to access the wireless network.
 13. The method of claim 12,wherein the unique identifier for each terminal comprises a MAC addressassigned to the terminal.
 14. The method of claim 12, wherein the listidentifies the connection requests using the unique identifiers for theterminals associated with the connection requests.
 15. The method ofclaim 12, wherein the user interface is displayed on an externalcomputing system coupled to the base transceiver via the wirelessnetwork.
 16. The method of claim 12, wherein the list associates theunique identifier with a time of the connection request for a respectiveterminal.
 17. The method of claim 16, wherein the unique identifier foreach terminal comprises a cleartext name for the terminal, and the userinterface associates the cleartext name with a MAC address assigned tothe terminal.